Alexander has just moved into Stermont, but the elementary school is being torn down, his new classroom is located in the hospital morgue, a notebook he finds is full of information about monsters--and everywhere he turns there are spooky balloon men determined to attack him.

Sam Graves discovers that his elementary school is alive and plotting against the students, and, as hall monitor, it is his job to protect them--but he will need some help from his friends.

At the end of recess at Eerie Elementary, everything on the school grounds suddenly comes alive and turns into a fog-filled jungle maze intent on trapping and disposing of hall monitor Sam Graves and his friends, Antonio and Lucy.

Alexander keeps seeing monsters he has previously conquered, but every time he gets close they disappear and his friends are beginning to think he is delusional--but when one of their teachers turns into a blob of super-goop right before their eyes they realize the team is dealing with a shape-shifter, and it is after the Notebook of Doom.

The Notebook of Doom is missing and Alexander and his fellow monster-hunters Rip and Nikki are convinced that the boss-monster has it. But is that monster the mysterious Principal Vanderpants--who is certainly behaving oddly--or someone else? They need to figure that out quickly because a mistake could have deadly consequences for Stermont Elementary.

"Next stop...The Magic School Bus heads to the Galapagos Islands to learn about invasive species! Seat belts, everyone! The class returns from summer break to find their beloved Ms. Frizzle has been promoted and her younger sister, Fiona Frizzle, is taking her place. But Arnold is worried. What if the new Ms. Frizzle makes a mess of things? His fears come true when she takes them on a field trip and everything goes wrong! Can Arnold find a way to...

"In this addition to our Magic School Bus Rides Again Branches Series, the class travels inside Carlos' nose after he develops a mysterious illness."--

Baron von Bubbles (Bub) is a pug who wants nothing more than to help his human Bella in her craft projects for school, though he is a little apprehensive about the rocket she is making for the Inventor Challenge--so when he ruins the rocket while trying to get at Nutz the squirrel he needs to find a way to make it up to Bella

To prevent the Shadow Dragon from plunging the world into sky-shadow the Drake and Darma seek out a Light Dragon named Lysa, but they learn from her dragon master they need to summon a Star Dragon with a star flute, hidden within a dangerous labyrinth.

It is Bub the pug's first trip to the beach, and Bella wants to enter him in a pet-surfing contest, but Bub is scared of the ocean and refuses, so he hopes to make it up to Bella by presenting her with the treasure at the end of the map he found.